A265869 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no element plus any antidiagonal neighbor equal to n-1.

1, 6, 3136, 3965392, 21193260208, 187225073253120, 4173639524545757568, 132528239245373078204160

Offset: 1

Author

R. H. Hardin, Dec 17 2015

Keywords

• nonn

Comments

Column 4 of A265870.

Examples

			Some solutions for n=3
..1..2..0..0....0..2..2..0....1..1..0..1....1..2..0..1....1..1..2..0
..1..1..0..2....1..1..0..2....0..0..2..2....2..1..0..0....2..2..0..0
..0..1..2..2....2..1..1..0....1..2..2..0....2..0..1..2....2..0..1..1
		

Crossrefs

Cf. A265870.